I agree with the N55 being smoother than the N54. But only slightly smoother. You definitely get slightly better gas mileage too which is a bonus IMO
__________________
Past: BMW (22 G20 M340i, 15 F80 ///M3, 12 E92 335i, 08 E90 335i, 02 E46 325i)
Mercedes-Benz, Porsche, VW, Lexus
Present: 24 992 C2